Recent content by Norngpinky

I had calulus I last semester so I sort of forgot how to do integral, but I shall go back on that tomorrow =) As for the 2nd problem, the density would be 1000 kg/m^3 @ 0 degree celsius...so D=M/V...so.. the mass would be D times volume...so the mass would be 3kg? That sounds wrong. And...

I did what you said... In the first problem... if I converted 28 degress celsius to kelvins it would be 301K so then would we have 4.5= TL/(301-TL) ?? Second problem...I still don't get how to convert 3.00m^3 into cm^3 or L or Kg for that matter... Third problem... so I did S of cup...

Homework Statement A restaurant refrigerator has a coefficient of performance of 4.5. If the temperature in the kitchen outside the refrigerator is 28^\circ C, what is the lowest temperature that could be obtained inside the refrigerator if it were ideal?Homework Equations According to...

Oh yes... I don't know why I didn't think of that. I know I messed up on the P=mav since P can be Fv (average) as well. . . and didn't know how to get average v...Did the addition of velocities divided by two, but still got the wrong answer. Thank you ^^ Your explanation makes a lot of sense.

Homework Statement If a 1500kg car can accelerate from 35 km/h to 55 km/h in 4.0 s, how long will it take to accelerate from 55 km/h to 75 km/h? Assume the power stays the same, and neglect frictional losses. Homework Equations Converting the velocities to m/s, I got... V1=9.7m/s...

OK, thank you! =)

Homework Statement A projectile is shot upward from the top of a cliff in an angle of 25 with a velocity of 195 m/s.The height of the cliff is 315m. What will be its speed when it strikes the ground below? (Use conservation of energy) Homework Equations Ok...initial energy = final...

Alright! You're awesome. Thank you for your help! =]

AHA, that makes a lot more sense. So r would be the same even if the ball was in a horizontal circular motion, right?

Shouldn't it still be half the length of cord still since the center of the circle would be at the middle, so r should be half of the length...no?

Homework Statement A 0.150-kg ball on the end of a 1.10-m-long cord (negligible mass) is swung in a vertical circle. Homework Equations Total net force = mass*centripetal acceleration = mass*(velocity squared)/radius The Attempt at a Solution The question I have is that... I'm...

Alright! Thank you! =]

Hello there, it's my first semester in Physics I, so I'm not exactly sure which is which. If someone would clarify what these are, that would be wonderful. They're for our lab report. - Principal Results - Sources of Uncertainty (in order of importance) This is our first lab...